An epithelial neoplasm of the female reproductive system arising from mesonephric remnants. The disease is mesonephric neoplasm (MONDO_0024888, a Monarch Disease Ontology entry). Also known as: Wolffian duct neoplasm, Wolffian duct tumor, Wolffian duct tumour, mesonephric duct neoplasm, mesonephric duct tumor, mesonephric duct tumour, mesonephric tumor, mesonephric tumour.